Valve silencer



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A. c. ENNIS VALVE SILENCER Filed Nov. 12. 1923 Ill . view.

Patents .llulv l, ld.

- ANDREW C. ENNISDF SMITHFIJELD, NORTHflULINA.

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Application filed November. 12,1923; Serial No. 674,295.

I '0 all/whom it may concern:

Be it known that ll, ANDREW O. ENNIS, a citizen of the United States, residing at Smithfield, in the county of Johnston and State of North Carolina, have invented certain new and useful Improvements in Valve Silencers; and I do declare the following to be a full, clear, and exact descriptionof the I invention, such as will enable others skilledin the art towhich it appertains to make and use the same. My invention relates to improvements in silencers for the push -rods of overhead valves, for automobile and other motors.

The object'of the invention is to provide a simply constructed, inexpensive, easily applied, and highly efiicient silencer which is of such cbnstruction thatit maybe kept packed with grease to prevent wear and to assist in the silencing operation. v With the foregoingin'view, the invention. resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing. Figure l'is a side elevation otthe inven-' tion showing its application"? Figure 2 is an enlarged verticalsectional Figure 3 is aihorizontal/section on line. 3-3 of Fig. 2.

Figure 4: is a -'vertical sectional view through the grease-containing casing.

The preferred construction of my invention is illustrated in the accompanying drawing, froniwhich it will'befseen that I make use of an outervertically disposed cy-" lindrical sleeve lfwhichis' open. at its top; to-

receive the lower spherical end 2 of -an up-' per push-rod section 3, theup'per edge of the sleeve 1 however,being tur'ned inwardly to provide a flange 4G, for 'a purpose to appear. Disposed concentrically within the sleeve 1, is a relatively small. nner sleeve 5 whose upper end is closedasfat '6 and is spaced downwardly within the upper end of the outer sleeve 1. The lower end of the sleeve 5 is 0 on to receive theupper end of a lower pus -rod section 7 and a closure 8 is provided for the space between the lower ends of the two sleeves, said closure being preferably integral with said sleeves as shown. v

Within the upper portion oi the sleeve 1,

' packed with the upper end of the lowerv push ro -tion 7,' so that the only s ace existing, is

over the closed upper end 6 of the sleeve 5, is a floating disk 9 having a concavo-convex central portion 10 with its .concaveside disposed upwardly to receive thefspheri'cal end 2 of the upper push-rod sect1on'3.- The closed upper end of the inner sleeve 5- is formed with a shallow concave recess 11 reerable, it will be seen that in some instances,

' the diskf) might be flat,'and the parts '3 and I I the inner sleeve 5 and forces iupwa'rdly 'ceiving the convex lower side of the disk- 'port1onl0. While this construction is-prefagainst the disk 9, and downwardly upon the" 1 closure 8. It may here'be stated that before the device is installed, the spring is prevented from forcing the disk 9 out of the sleeve or casing' l, by the flange 4. p

p The casing or sleeve 1 1s lnt'ended to. be

ease, and it will be seen that as thespring 12 forces upwardly upon thedisk 9 and downwardlyjupon the casing 'or sleeve 1, a slight space will normally loe created'between' the inner sleeveend 6 and said disk (see 2).

This space fills with grease 'f romt e casing or sleeve 1 andwhen the push-rod section 7 thrusts grease between the two. l-lence, there'will be no noise, such as that occasioned when rating parts which are norapart, are suddenly brought into contact with each other. The disk 9 two valve-0g mally-fspa'ce upwardly, the. thrust-of the sleeve end 6, againstth'e fdiskz 9, is cushionedby the 5 is similarly always held tightly a'ainst between the upper end 6 o the inner sleeve 5. andthe' disk '9, but asthis 'spacefills with grease, which'cushions the u ward thrust as above set forth, no noise Wlll result.

Asjexcellen-t results are obtainablefrom the details disclosed, they are preferably followed,but Within the scope of the inven tion as claimed, numerous minor changes push-rod section, an innersleeve disposed concentrically in said outer sleeve and hav-. ing its lower end open to receive the upper end of a lower push-rod Section, the upper end of said inner sleeve being closed andspaced downwardly from the upper end of said outer sleeve, a disk in said outer sleeve over said'vinner sleeve to abut the upper push-rod section, a closure between the lower ends of the two sleeves, and a coiled compression spring surrounding said inner sleeve with its upper end in contact with said disk and its lower end'resting on said closure.

2. A structure as specified .in claim 1; said disk having a concavo-convex central portionwith its convex side disposed downwardly, the closed upper end of said inner sleeve having a concave recess receiving said convex side.

3. A device of the class described comprising an outer sleeve open at its upper end to receive the lower end of an upper push-rod section, an inner sleeve disposed concentrically within said ,outer sleeve in spaced relation and having its lower end open to receive the upper end of a lower push-rod section, the upper end of said inner sleeve being closed and bein spaced downwardly from the correspon ing end of the outer sleeve, anda web connecting the lower ends of said sleeves for closing the space therebetween.

In testimony whereof I have hereunto affixed my signature.

ANDREW C. ENNIS. 

